CN216937115U - Iron ore dressing equipment - Google Patents
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- CN216937115U CN216937115U CN202122127850.6U CN202122127850U CN216937115U CN 216937115 U CN216937115 U CN 216937115U CN 202122127850 U CN202122127850 U CN 202122127850U CN 216937115 U CN216937115 U CN 216937115U
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 226
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 113
- 239000002245 particle Substances 0.000 claims abstract description 89
- 239000000463 material Substances 0.000 claims abstract description 73
- 238000000227 grinding Methods 0.000 claims abstract description 68
- 239000000428 dust Substances 0.000 claims abstract description 44
- 239000000843 powder Substances 0.000 claims abstract description 36
- 239000006148 magnetic separator Substances 0.000 claims abstract description 32
- 238000005456 ore beneficiation Methods 0.000 claims abstract description 31
- 239000004576 sand Substances 0.000 claims abstract description 30
- 239000002699 waste material Substances 0.000 claims abstract description 16
- 238000000926 separation method Methods 0.000 claims description 33
- 230000009471 action Effects 0.000 claims description 15
- 238000007599 discharging Methods 0.000 claims description 10
- 239000010878 waste rock Substances 0.000 claims description 6
- 230000003068 static effect Effects 0.000 claims description 4
- 230000000903 blocking effect Effects 0.000 claims description 3
- 239000011236 particulate material Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 20
- 230000008569 process Effects 0.000 abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 7
- 238000003912 environmental pollution Methods 0.000 abstract description 6
- 239000011435 rock Substances 0.000 abstract 1
- 238000007885 magnetic separation Methods 0.000 description 14
- 239000004575 stone Substances 0.000 description 11
- 238000005516 engineering process Methods 0.000 description 8
- 238000010494 dissociation reaction Methods 0.000 description 5
- 230000005593 dissociations Effects 0.000 description 5
- 238000012216 screening Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 229910052500 inorganic mineral Inorganic materials 0.000 description 4
- 239000011707 mineral Substances 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
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Abstract
The utility model discloses iron ore dressing equipment which comprises a roller mill, a cyclone dust collector, a circulating fan, a first dry magnetic separator and a second dry magnetic separator, wherein the roller mill is provided with a multi-stage particle separator, a ground heavy particle material is discharged from the roller mill, a light particle material enters the multi-particle separator, a second outlet discharges a large particle material, a third outlet discharges a small particle material, and a first air outlet discharges iron ore powder; a fifth outlet collects and discharges sand in the waste rocks; a seventh outlet collects and discharges the waste fine sand; the cyclone dust collector comprises a second air inlet, a second air outlet and an eighth outlet, and the eighth outlet collects discharged iron ore powder. The iron ore beneficiation equipment provided by the utility model simplifies the process, reduces the power consumption, the water consumption and the environmental pollution, throws out the building sand meeting the requirement and the iron ore powder with the fineness meeting the follow-up process of the beneficiation process while grinding, and improves the iron grade of the iron ore powder while reducing the iron grade of the thrown building sand.
Description
Technical Field
The utility model relates to the technical field of iron ore beneficiation processes, and particularly relates to iron ore beneficiation equipment.
Background
Iron ore is an important raw material for iron and steel production enterprises, and natural iron ore with the grade of generally less than 50% can be smelted and utilized through mineral separation procedures such as crushing, grinding, magnetic separation, flotation, gravity separation and the like. The existing characteristics of the Chinese iron ore and the requirements of the iron and steel industry on iron ore concentrate at present provide higher development requirements for ore dressing work and ore dressing technology of the Chinese metallurgical mine, and further provide higher requirements for ore dressing equipment. With the development of modern technology, energy conservation becomes an important content in the iron ore dressing process in China, and only by continuously optimizing the process flow scientifically and reasonably, the iron ore dressing equipment can be guaranteed to meet the development requirement of modernization, and energy conservation control is realized.
At present, the ore grinding technology for ore dressing of iron ore with more advanced technology adopts a commonly-known high-pressure roller mill and two-stage ore grinding consisting of a high-pressure roller mill, a ball mill and a ball mill, is actually a process flow of three-stage ore grinding, and has the following problems in the ore grinding flow consisting of the first two stages of the high-pressure roller mill and the ball mill: firstly, powder grinding and non-magnetic waste stone throwing cannot be simultaneously realized; secondly, the materials obtained by the high-pressure roller milling can be fed into second-stage ore grinding after tailings are selected by wet screening and wet preselection, the materials obtained by the second-stage ore grinding can be fed into third-stage ore grinding after wet magnetic separation and wet classification, the process flow and the technology are complex, the power consumption and the water consumption are high, and the wet screening and the wet preselection cause environmental pollution in the conveying process.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention aims to provide an iron ore beneficiation apparatus, so as to simplify the process, reduce power consumption and water consumption, throw out building sand meeting the requirement and iron ore powder with fineness meeting the follow-up process of the iron ore beneficiation process while grinding, improve the iron grade of the iron ore powder while reducing the iron grade of the thrown building sand, and reduce environmental pollution.
Based on the above purpose, the utility model provides iron ore beneficiation equipment, which comprises a roller mill, a cyclone dust collector, a circulating fan, a first dry magnetic separator and a second dry magnetic separator, wherein: the multi-stage particle sorting machine comprises a second outlet, a third outlet and a first air outlet, the second outlet is used for discharging large-particle materials, the third outlet is used for discharging small-particle materials, and the first air outlet is used for discharging iron ore powder; the first dry magnetic separator comprises a second inlet, a fourth outlet and a fifth outlet, the second inlet is communicated with the second outlet, the fourth outlet is communicated with the first inlet, so that the material discharged from the fourth outlet enters the roller mill again for grinding; the fifth outlet is used for collecting the discharged waste stone medium sand after dry separation; the second dry magnetic separator comprises a third inlet, a sixth outlet and a seventh outlet, the third inlet is communicated with the third outlet, and the sixth outlet is communicated with the first inlet, so that the material discharged from the sixth outlet enters the roller mill again for grinding; the seventh outlet is used for collecting the waste fine sand after the dry separation; the cyclone dust collector comprises a second air inlet, a second air outlet and an eighth outlet, the second air inlet is communicated with the first air outlet, and the eighth outlet is used for collecting discharged iron ore powder; the circulating fan comprises a third air inlet and a third air outlet, the third air inlet is communicated with the second air outlet, and the third air outlet is communicated with the first air inlet.
Optionally, the cyclone dust collector further comprises a fourth air outlet, and the fourth air outlet is communicated with the third air inlet.
Optionally, the iron ore beneficiation equipment further comprises a bag dust collector and a bag dust collecting fan, the bag dust collector comprises a fourth air inlet, a fifth air outlet and a ninth outlet, the bag dust collecting fan comprises a fifth air inlet and a sixth air outlet, the fourth air inlet is communicated with the third air outlet, the fifth air outlet is communicated with the fifth air inlet, and the sixth air outlet is communicated with the atmosphere.
Optionally, the iron ore beneficiation equipment further comprises a first vibrating feeder and a second vibrating feeder, the first vibrating feeder comprises a fourth inlet and a tenth outlet, the fourth inlet is communicated with the second outlet, and the tenth outlet is communicated with the second inlet; the second vibrating feeder comprises a fifth inlet and an eleventh outlet, the fifth inlet is communicated with the third outlet, and the eleventh outlet is communicated with the third inlet.
Optionally, the multistage particle separator further comprises a first-stage separation device composed of a plurality of guide plates, so as to separate large-particle materials with particle sizes smaller than 2.0 mm.
Optionally, the multi-stage particle separator further comprises a second-stage separation device composed of a static blade and a rotor, so as to separate small particle materials with the particle size smaller than 0.5 mm.
Optionally, the multistage particle separator further comprises a dynamic rotor device to sort out iron ore powder with fineness of-200 meshes and 75%.
Optionally, the roller mill further includes a grinding area and an air ring, the grinding area is composed of a grinding roller, a grinding disc and a material blocking ring, the grinding area repeatedly grinds the material, the ground material enters the air ring, and heavy particle materials are sorted out under the action of the air.
Optionally, the iron ore beneficiation equipment further comprises an air pipe, and the sixth air outlet is communicated with the air pipe, so that air flow discharged from the sixth air outlet enters the atmosphere through the air pipe.
Optionally, the iron ore beneficiation plant further comprises a conveying apparatus through which the heavy particulate material discharged from the first outlet enters the first inlet.
The utility model provides iron ore beneficiation equipment, which comprises a roller mill, a cyclone dust collector, a circulating fan, a first dry magnetic separator and a second dry magnetic separator, wherein materials enter the roller mill from a first inlet and are ground, heavy-particle materials are discharged from a first outlet and then return to the roller mill for secondary grinding, the ground light-particle materials rise under the action of wind and enter a multi-particle separator for separation, large-particle materials pass through a second outlet and the first dry magnetic separator, under the magnetic separation action, sand in nonmagnetic waste stones is discharged and collected through a fifth outlet, and materials needing to be ground again enter the roller mill through a fourth outlet for continuous grinding; after the small-particle materials pass through the third outlet and the second dry magnetic separator, under the magnetic separation action, nonmagnetic waste stone and fine sand are discharged and collected through the seventh outlet, and the materials needing to be ground again enter the roller mill through the sixth outlet for continuous grinding; under cyclone's effect, the air current discharges the iron ore powder from the first air outlet on the multi-particle sorting machine to the cyclone, and discharge through the eighth export and collect, the sorting process of above-mentioned iron ore, the flow has been simplified, whole process does not use wet-type screening and wet-type preliminary election, water consumption and power consumption have been reduced, throw the iron ore powder that satisfies the building sand and the follow-up flow of fineness satisfying the follow-up flow of ore dressing technology in the time of the grinding, while grinding, select separately and throw the tail with the magnetic separation, the iron grade of iron ore powder has been improved when reducing the iron ore grade of throwing the building sand, environmental pollution has been reduced.
Drawings
The objects and advantages of the present invention will be understood by the following detailed description of the preferred embodiments of the utility model, taken in conjunction with the accompanying drawings, in which:
fig. 1 is a schematic structural view of an iron ore beneficiation plant according to an embodiment of the present invention;
FIG. 2 is a schematic process flow diagram of an iron ore beneficiation plant according to an embodiment of the present invention;
fig. 3 is a partial schematic view of a roller mill in an iron ore beneficiation plant according to an embodiment of the present invention.
Description of reference numerals:
1: roller milling; 2: a cyclone dust collector; 3: a circulating fan; 4: a first dry magnetic separator; 5: a second dry magnetic separator; 6: a multi-stage particle sorter; 7: a bag dust collector; 8: a bag dust collection fan; 9: a first vibratory feeder; 10: a second vibratory feeder; 11: a first inlet; 12: a first outlet; 13: a first air inlet; 14: grinding the roller; 15: a grinding disc; 16: a material blocking ring; 17: a wind ring; 18: an air duct; 19: a conveying device;
20: an iron ore crushing system; 21: a second air inlet; 22: a second air outlet; 23: an eighth outlet; 24: a fourth air outlet;
31: a third air inlet; 32: a third air outlet;
41: a second inlet; 42: a fourth outlet; 43: a fifth outlet;
51: a third inlet; 52: a sixth outlet; 53: a seventh outlet;
61: a second outlet; 62: a third outlet; 63: a first air outlet;
71: a fourth air inlet; 72: a fifth air outlet; 73: a ninth outlet;
81: a fifth air inlet; 82: a sixth air outlet;
91: a fourth inlet; 92: a tenth outlet; 93: a fifth inlet; 94: an eleventh outlet.
Detailed Description
The present invention will be described in detail with reference to examples. In which like parts are designated by like reference numerals. It should be noted that as used in the following description, the terms "front," "back," "left," "right," "upper" and "lower" refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
As shown in fig. 1 and 2, the iron ore beneficiation equipment provided by the present invention comprises a roller mill 1, a cyclone dust collector 2, a circulating fan 3, a first dry magnetic separator 4, and a second dry magnetic separator 5, wherein: the multi-stage particle sorting machine 6 is mounted at the top end of the roller mill 1, the roller mill 1 comprises a first inlet 11, a first outlet 12 and a first air inlet 13, the first air inlet 13 is used for providing grinding air for the roller mill 1, materials enter the roller mill 1 through the first inlet 11 for grinding, ground heavy particle materials are discharged out of the roller mill 1 through the first outlet 12, ground light particle materials rise under the action of the air and enter the multi-particle sorting machine, the multi-stage particle sorting machine 6 comprises a second outlet 61, a third outlet 62 and a first air outlet 63, the second outlet 61 is used for discharging large particle materials, the third outlet 62 is used for discharging small particle materials, and the first air outlet 63 is used for discharging iron ore powder; the first dry magnetic separator 4 comprises a second inlet 41, a fourth outlet 42 and a fifth outlet 43, the second inlet 41 is communicated with the second outlet 61, the fourth outlet 42 is communicated with the first inlet 11, so that the material discharged from the fourth outlet 42 enters the roller mill 1 again for grinding; the fifth outlet 43 is used for collecting the discharged waste stone and medium sand after dry separation; the second dry magnetic separator 5 comprises a third inlet 51, a sixth outlet 52 and a seventh outlet 53, wherein the third inlet 51 is communicated with the third outlet 62, and the sixth outlet 52 is communicated with the first inlet 11, so that the material discharged from the sixth outlet 52 enters the roller mill 1 again for grinding; the seventh outlet 53 is used for collecting and discharging the waste fine sand after dry separation; the cyclone dust collector 2 comprises a second air inlet 21, a second air outlet 22 and an eighth outlet 23, the second air inlet 21 is communicated with the first air outlet 63, and the eighth outlet 23 is used for collecting the discharged iron ore powder; the circulating fan 3 comprises a third air inlet 31 and a third air outlet 32, the third air inlet 31 is communicated with the second air outlet 22, and the third air outlet 32 is communicated with the first air inlet 13.
It should be noted that: the material entering the roller mill 1 comes from an iron ore crushing system 20; in fig. 2, the part enclosed by the solid line is the part of the present invention, which replaces the flow part (high pressure roller mill and first stage ore grinding) of the existing iron ore dressing flow, the part enclosed by the dotted line is the existing iron ore dressing flow, i.e. the subsequent flow of high pressure roller mill and first stage ore grinding, and the material enters the subsequent flow part enclosed by the dotted line after passing through the iron ore dressing equipment provided by the present invention; the iron ore powder can be 75% of iron ore powder of-200 meshes, wherein "-" in the whole text means lower, and "+" means higher, for example, -200 meshes means less than 200, and the ore dressing industry is generally indicated by "-200 meshes"; similarly, the +5mm shown in FIG. 2 means greater than 5mm, -2.0mm means less than 2.0mm, -0.5mm means less than 0.5 mm.
The utility model provides iron ore beneficiation equipment, which comprises a roller mill 1, a cyclone dust collector 2, a circulating fan 3, a first dry magnetic separator 4 and a second dry magnetic separator 5, wherein materials enter the roller mill 1 from a first inlet 11 and are ground, heavy-particle materials are discharged out of the roller mill 1 from a first outlet 12 and then return to the roller mill 1 for secondary grinding, the ground light-particle materials rise under the action of wind and enter a multi-particle separator for separation, after large-particle materials pass through a second outlet 61 and the first dry magnetic separator 4, under the magnetic separation action, nonmagnetic waste stone sand in waste stones is discharged and collected through a fifth outlet 43, and materials needing to be ground again enter the roller mill 1 through a fourth outlet 42 for continuous grinding; after the small-particle materials pass through the third outlet 62 and the second dry magnetic separator 5, under the magnetic separation action, the nonmagnetic waste stone and fine sand are discharged and collected through the seventh outlet 53, and the materials to be ground again enter the roller mill 1 through the sixth outlet 52 for continuous grinding; under the effect of cyclone fan, the air current discharges the iron ore powder from first air outlet 63 on the multi-particle separator to cyclone 2, and discharge through eighth export 23 and collect, the sorting process of above-mentioned iron ore, the flow has been simplified, do not use wet-type screening and wet-type preliminary election in the whole journey, water consumption and power consumption have been reduced, throw out the building sand that satisfies the demand and the iron ore powder that the follow-up flow of ore dressing technology satisfies the fineness when grinding, grind, select separately and throw the end while the magnetic separation, improve the iron grade of iron ore powder when reducing the iron grade of throwing building sand, environmental pollution has been reduced. As shown in fig. 1, the cyclone dust collector 2 further includes a fourth air outlet 24, and the fourth air outlet 24 is communicated with the third air inlet 31. In this embodiment, the fourth air outlet 24 provided in the cyclone dust collector 2 is beneficial to reducing the internal pressure loss of the cyclone dust collector 2, increasing the dust collecting efficiency of the cyclone dust collector 2, and further improving the service life and service efficiency of the iron ore beneficiation equipment.
As shown in fig. 1, the iron ore beneficiation equipment further includes a bag dust collector 7 and a bag dust collecting fan 8, the bag dust collector 7 includes a fourth air inlet 71, a fifth air outlet 72 and a ninth outlet 73, the bag dust collecting fan 8 includes a fifth air inlet 81 and a sixth air outlet 82, the fourth air inlet 71 is communicated with the third air outlet 32, the fifth air outlet 72 is communicated with the fifth air inlet 81, and the sixth air outlet 82 is communicated with the atmosphere. It should be noted that: a large amount of iron ore powder is collected by the cyclone dust collector 2 with higher dust collection efficiency, and a large amount of circulating air is used for providing working air for the roller mill 1, so that gas enters the bag dust collector 7 in a dilute phase conveying mode with low concentration, the processing air quantity and the gas dust content of the bag dust collector 7 are reduced, the volume of the bag dust collector 7 is reduced, the emission concentration of system dust can easily reach the environmental protection index, and the operation and maintenance cost of a grinding system of iron ore dressing equipment is further reduced. In this embodiment, the bag dust collector 7 can collect, under the action of the bag dust collecting fan 8, the material that is not discharged from the eighth outlet 23 of the cyclone dust collector 2 into the bag dust collector 7 for further collection, and discharge the iron ore powder from the ninth outlet 73 of the bag dust collector 7, so that the use efficiency of the iron ore beneficiation equipment is increased, the content of the material discharged into the atmosphere is reduced, and the pollution to the atmosphere is reduced.
As shown in fig. 1, the iron ore beneficiation plant further comprises a first vibrating feeder 9 and a second vibrating feeder 10, the first vibrating feeder 9 comprises a fourth inlet 91 and a tenth outlet 92, the fourth inlet 91 is communicated with the second outlet 61, and the tenth outlet 92 is communicated with the second inlet 41; the second vibratory feeder 10 includes a fifth inlet 93 and an eleventh outlet 94, the fifth inlet 93 communicating with the third outlet 62, and the eleventh outlet 94 communicating with the third inlet 51. In this embodiment, the first vibrating feeder 9 can feed the material to the first dry magnetic separator 4 uniformly, periodically and continuously for magnetic separation, and similarly, the second vibrating feeder 10 can feed the material to the second dry magnetic separator 5 uniformly, periodically and continuously for magnetic separation, thereby improving the reliability of the use of the iron ore dressing apparatus.
In an embodiment of the utility model, the multistage particle separator 6 further comprises a primary separation device consisting of a plurality of guide plates to separate large-particle materials with the particle size less than 2.0mm, so that secondary separation of fine ore particles is completed, and the use convenience of iron ore dressing equipment is improved.
In one embodiment of the utility model, the multistage particle separator 6 further comprises a secondary separation device consisting of static blades and a rotor, so as to separate small particle materials with the particle size less than 0.5mm, complete the third separation of fine ores, and improve the use convenience of iron ore dressing equipment.
In one embodiment of the utility model, the multistage particle sorting machine 6 further comprises a dynamic rotor device to sort out iron ore powder with the fineness of-200 meshes and 75 percent, so that the fourth sorting of the fine ore particles is completed, and the use convenience of iron ore dressing equipment is improved.
As shown in fig. 3, the roller mill 1 further includes a grinding area composed of a grinding roller 14, a grinding disc 15 and a material stop ring 16, and an air ring 17, wherein the grinding area repeatedly grinds the material, and the ground material enters the air ring 17 and is separated out heavy particle materials under the action of air. In this embodiment, the fine ore particles ground in the grinding area are driven by the centrifugal force of the grinding disc 15 to be fed into the air ring 17, and the heavy particle materials with the mass of more than 5mm (+5mm) are timely sorted under the action of the wind force, and are discharged out of the roller mill 1, so that the first sorting is completed; the heavy particle materials which are discharged from the roller mill 1 and have a size of more than 5mm (+5mm) are sent back to the roller mill 1 for grinding and sorting again, while the light particle materials with relatively small mass are sent into the multistage particle sorting machine 6 for sorting by the ascending air flow, so that the use convenience of the iron ore dressing equipment is improved.
As shown in fig. 1, the iron ore dressing plant further includes an air duct 18, and the sixth air outlet 82 is communicated with the air duct 18, so that the air flow discharged from the sixth air outlet 82 enters the atmosphere through the air duct 18. In this embodiment, the waste gas that discharges in the fan of bag dust collector 7 passes through tuber pipe 18 and discharges into the atmosphere again, has not only guaranteed the circulation of iron ore dressing equipment with atmospheric, has reduced the concentration of harmful gas in the waste gas moreover, has improved the safety in utilization of iron ore dressing equipment.
As shown in figure 1, the iron ore beneficiation plant further comprises a conveying apparatus 19, and the heavy particulate material discharged from the first outlet 12 passes through the conveying apparatus 19 into the first inlet 11. In this embodiment, conveying equipment 19 can convey the material that needs to carry to appointed position relatively fast, has improved iron ore dressing equipment's availability factor.
In one embodiment of the utility model, the roller mill 1 finishes repeated grinding dissociation and pre-separation (namely, the first separation of the fine ores) of the material fine ore particles and the intermediate magnetic mineral particles generated in the separation process; after grinding and dissociation and pre-sorting by a roller mill 1, the ore powder particles are reduced from the initial size of less than 30mm (-30mm) to about less than 0.5mm (-0.5mm), monomer dissociation of various particles in the ore powder is completed in the process of material particle reduction, and minerals and iron ore powder with three particle size grades of more than 5mm (+5mm), < 2.0mm (-2mm) and < 0.5mm (-0.5mm) are released. As shown in fig. 3, the baffle ring 16 and the air ring 17 in the roller mill 1 can selectively sort the ground particles with a heavier mass of more than 5mm (+5mm) in time and discharge the particles out of the roller mill 1 (the first sorting of the fine ore is completed), and then send the particles back to the roller mill 1 for the regrinding and sorting.
The multistage particle separator 6 is arranged on the roller mill 1, receives the powder ore after grinding, dissociation and separation, and according to the different particle sizes, a primary separation system consisting of a plurality of guide plates separates large particles (second separation) with the particle size of less than 2.0mm (-2.0mm), a static blade and a rotor jointly separate small particles (third separation) with the particle size of less than 0.5mm (-0.5mm), and a dynamic rotor separates iron ore powder (fourth separation) with the fineness of-200 meshes and 75 percent meeting the follow-up flow of the iron ore dressing process, namely the second separation, the third separation and the fourth separation of the powder ore are completed in sequence.
The large particles selected by the multistage particle sorting machine 6 are sent into a first dry-type magnetic separator 4, and the first tailing discarding of the fine ore is completed; the small particles are sent into a second dry magnetic separator 5 to finish the second tailing discarding of the fine ore; the dry-separated waste rock medium sand and the dry-separated waste rock fine sand thrown out by the first dry magnetic separator 4 and the second dry magnetic separator 5 meet the machine-made sand requirement of GB/T14684 building sand, and other mineral particles subjected to magnetic separation are returned to the roller mill 1 for grinding, dissociating and separating again.
The roller mill 1 is characterized in that the grinding disc 15 is designed with proper rotating speed and grinding pressure of the grinding roller 14 aiming at the grindability of iron ore, according to the specific performance of the iron ore, the rotating speed of the grinding disc 15 is set to be constant within a range of 20-28rpm, the grinding pressure of the grinding roller 14 is set to be within a range of 18-22Mpa, and the grinding pressure is flexibly adjusted through a hydraulic loading system matched with the grinding roller so as to better realize the dissociation of iron and gangue in the iron ore and perform subsequent secondary separation, tertiary separation and fourth separation.
The air ring 17 of the roller mill 1 is designed with proper air speed aiming at the granularity and the grinding fineness of the iron ore, wherein the air speed is adjusted by the air volume of the system circulating fan 3 and is controlled within the range of 40-50m/s, and the reasonable air speed of the air ring 17 can effectively sort and discharge the particles with heavier mass more than 5mm (+5mm) out of the vertical roller mill in time after grinding, thereby achieving the first sorting effect.
In another embodiment of the utility model, the comparison results of the content of the sorted-200-mesh iron ore powder and the content of the waste rock thrown off by discarding the tail by using the iron ore beneficiation equipment provided by the utility model and the prior art are as follows:
table-200 mesh iron ore powder content
Fineness modulus of waste rock medium sand and waste rock fine sand thrown out by throwing the tail of the second table
The iron ore beneficiation equipment provided by the utility model has the following power consumption: not more than 14.5kWh/t, and the water consumption of the iron ore dressing equipment except the transmission equipment (needing cooling water) is 0m3/h。
The utility model provides iron ore beneficiation equipment, which comprises a roller mill 1, a cyclone dust collector 2, a circulating fan 3, a first dry magnetic separator 4 and a second dry magnetic separator 5, wherein materials enter the roller mill 1 from a first inlet 11 and are ground, heavy-particle materials are discharged out of the roller mill 1 from a first outlet 12 and then return to the roller mill 1 for secondary grinding, the ground light-particle materials rise under the action of wind and enter a multi-particle separator for separation, after large-particle materials pass through a second outlet 61 and the first dry magnetic separator 4, under the magnetic separation action, nonmagnetic waste stone sand in waste stones is discharged and collected through a fifth outlet 43, and materials needing to be ground again enter the roller mill 1 through a fourth outlet 42 for continuous grinding; after the small-particle materials pass through the third outlet 62 and the second dry magnetic separator 5, under the magnetic separation action, the nonmagnetic waste stone and fine sand are discharged and collected through the seventh outlet 53, and the materials to be ground again enter the roller mill 1 through the sixth outlet 52 for continuous grinding; under the effect of cyclone fan, the air current discharges the iron ore powder from first air outlet 63 on the multi-particle separator to cyclone 2, and discharge through eighth export 23 and collect, the sorting process of above-mentioned iron ore, the flow has been simplified, do not use wet-type screening and wet-type preliminary election in the whole journey, water consumption and power consumption have been reduced, throw out the building sand that satisfies the demand and the iron ore powder that the follow-up flow of ore dressing technology satisfies the fineness when grinding, grind, select separately and throw the end while the magnetic separation, improve the iron grade of iron ore powder when reducing the iron grade of throwing building sand, environmental pollution has been reduced.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides an iron ore dressing equipment which characterized in that, includes roll mill, cyclone, circulating fan, first dry-type magnet separator, second dry-type magnet separator, wherein:
the multi-stage particle sorting machine comprises a second outlet, a third outlet and a first air outlet, the second outlet is used for discharging large-particle materials, the third outlet is used for discharging small-particle materials, and the first air outlet is used for discharging iron ore powder;
the first dry magnetic separator comprises a second inlet, a fourth outlet and a fifth outlet, the second inlet is communicated with the second outlet, the fourth outlet is communicated with the first inlet, so that the material discharged from the fourth outlet enters the roller mill again for grinding; the fifth outlet is used for collecting the waste rock medium sand after the dry separation is discharged;
the second dry magnetic separator comprises a third inlet, a sixth outlet and a seventh outlet, the third inlet is communicated with the third outlet, and the sixth outlet is communicated with the first inlet, so that the material discharged from the sixth outlet enters the roller mill again for grinding; the seventh outlet is used for collecting the waste fine sand after the dry separation;
the cyclone dust collector comprises a second air inlet, a second air outlet and an eighth outlet, the second air inlet is communicated with the first air outlet, and the eighth outlet is used for collecting discharged iron ore powder;
the circulating fan comprises a third air inlet and a third air outlet, the third air inlet is communicated with the second air outlet, and the third air outlet is communicated with the first air inlet.
2. The iron ore beneficiation equipment according to claim 1, wherein the cyclone collector further comprises a fourth air outlet, and the fourth air outlet is communicated with the third air inlet.
3. The iron ore beneficiation equipment of claim 2, further comprising a bag dust collector and a bag dust collection fan, wherein the bag dust collector comprises a fourth air inlet, a fifth air outlet and a ninth outlet, the bag dust collection fan comprises a fifth air inlet and a sixth air outlet, the fourth air inlet is communicated with the third air outlet, the fifth air outlet is communicated with the fifth air inlet, and the sixth air outlet is communicated with the atmosphere.
4. The iron ore beneficiation plant according to claim 3, further comprising a first and second vibratory feeder, the first vibratory feeder comprising a fourth inlet and a tenth outlet, the fourth inlet communicating with the second outlet, the tenth outlet communicating with the second inlet; the second vibrating feeder comprises a fifth inlet and an eleventh outlet, the fifth inlet is communicated with the third outlet, and the eleventh outlet is communicated with the third inlet.
5. An iron ore dressing plant according to claim 4, characterized in that the multistage particle separator further comprises a primary separation device consisting of a plurality of deflectors to sort out large particle materials with a particle size < 2.0 mm.
6. An iron ore dressing plant according to claim 5, characterized in that the multistage particle separator further comprises a secondary separation device consisting of static blades and rotors to sort out small particle materials with a particle size < 0.5 mm.
7. The iron ore beneficiation plant according to claim 6, wherein the multistage particle sorting machine further comprises a dynamic rotor device to sort out iron ore fines having a fineness of-200 mesh 75%.
8. The iron ore beneficiation equipment according to claim 7, wherein the roller mill further comprises a grinding area and an air ring, the grinding area is composed of a grinding roller, a grinding disc and a material blocking ring, the grinding area repeatedly grinds the materials, the ground materials enter the air ring, and heavy particle materials are sorted out under the action of the air.
9. The iron ore beneficiation plant according to claim 8, further comprising an air duct, wherein the sixth air outlet is in communication with the air duct such that the air flow discharged from the sixth air outlet passes through the air duct into the atmosphere.
10. An iron ore beneficiation plant according to claim 9, further comprising a conveying apparatus through which the heavy particulate material discharged from the first outlet enters the first inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122127850.6U CN216937115U (en) | 2021-09-03 | 2021-09-03 | Iron ore dressing equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122127850.6U CN216937115U (en) | 2021-09-03 | 2021-09-03 | Iron ore dressing equipment |
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| CN216937115U true CN216937115U (en) | 2022-07-12 |
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| CN202122127850.6U Active CN216937115U (en) | 2021-09-03 | 2021-09-03 | Iron ore dressing equipment |
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| CN (1) | CN216937115U (en) |
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Effective date of registration: 20220714 Address after: No.568, Jinhong Road, Yueyang Industrial Zone, Baoshan District, Shanghai, 200941 Patentee after: LOESCHE MILLS (SHANGHAI) Co.,Ltd. Patentee after: Tianjin Aiwei Technology Co.,Ltd. Address before: 066000 room 510, unit 2, building 21, gangang mining yard, Qinhuangdao City, Hebei Province Patentee before: Sun Jianxin Patentee before: LOESCHE MILLS (SHANGHAI) Co.,Ltd. |